Ash gate



jan. 8 192,4. mmm@ F. H. DUNBAR ASH GATE Filed March 5, 1925 2Shee'bs8heet l Jan. 8 i924.

F. HfDUNBAR ASH GATE 2 Sheets-Sheet 2 Filed March 5, 1923 dan. ti, i924.

Application led March 5,

To aZZ whom t may concern Be it known that I, FRANK H. DUNBAR, a citizenof the United States, residing at Cleveland, in the county of Cuyahogaand s State of Ohio, have invented a certain new and useful `improvementin Ash Gates, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings.

This invention relates to closures for hoppers and is particularlyadapted to hoppers for receiving ashes or other loose material.

In the usual practice ash hoppers are designed to hold the hot ashesuntil they can be discharged in suitable transporting devices by openingthe door of a gate construction beneath the discharge opening. In orderto quench the hot ashes to prevent ythem from injuring the walls-of thehopper and Stoker parts considerable water is sprayed .on them. Itisdesirable therefore to remove this water in a satisfactory and eiiicientmanner.

An object of my invention is to provide a door for such hoppers whichwill at all times receive and discharge easily and quickly all suchliquid without allowing it to escape and fall in undesirable places.

- A further object of the invention is to pro- `3o vide a simple andetiicient means for keeping the passages for conducting the water frombecoming obstructed b settling of the fine sediment and materia carriedalong with the water.

Another object of the invention is to provide the closure mechanism withliquid conducting passages so arranged that the material carried alongwith the water cannot settle in certain passages and mechanism is 4oprovided for positively removing the material from the other passages. v

These and other objects will be appa-rent from the following descriptionand attached drawings forming a part of this application.

ln the accompanying drawings forming a part of this application, l

Figure 1 is a section on line 1--1, Fig. 2, showing the door in plan.

Fig. 2 is a vertical section taken on line 5o 2f-2, F ig. l.

Fig. 3 is an elevation showing thetracks in section as indicated by line3 3. Fig. 1.

Fig. d is a vertical Section of the bottom of the hopper and door online 4=--4, Fig. 1`

renne n; runnen, or onnvm., emo.

asn GATE.

3.A Surroundingthe discharge opening of the hopper is agate constructioncomprising a frame and a door, the frame e comprising sides 4 and ends4". The frame is supported from the hopper by any suitable means such asangle iron 5 to which the frame is bolted. v

The sides 4 of the frame are preferably of channel construction, eachhaving a ver`- tical web 6 and flanges 7 and 8 projecting outwardly, thelower ianges 7 forming tracks on which thedoor is suspended for movementas described hereinafter. The sides 4C are provided also on the insidewith anges 9 on which the lower edges of the refractory material rests.The door 10 is carried by arms 11 to which are attached rollers 12 torun on the anges? of the frame. The door is reciprocated to open andclosed position by any suitable mechanism such as a door operatingpiston and cylinder, the pistonrod bein shown at 10. Adjacent the endsof the rame sides Lli, suitable track extensions 13 are secured uponAwhich the door is carried during opening and closing movements.

Along the sides and preferably one end of the door are suitable channelsor troughs 14 and 15 for carrying of the liquid which comes through thematerial in the hopper. These may be attached to or made integral withthe door. The side troughs le, 15 are substantially horizontal andunderlie the flange 9 of the frame, there being sufficient clearanceprovided, however, between the inner flange of the trough and theextremity of the flange 9 to permit the water to escape outwardly easilybut preventing any large material from passing through. ln order to loodirect the water into the trough and prevent its being forced entirelyover the edge of the door, a suitable rib may extend downwardly from theflange 9 orthe outer flange 16 of the trough mav be made higher than theT105 space between the inner ianve of the trough and the opposing flange9 of the frame.

The front end of the door is preferably provided with a trough 17, thebottom of which is relatively sharply inclined so that the line sedimentand material which is carried along with the water cannot deposit in thetrough as when the slope is relatively gradual. The trough of coursewould cease to function if it became full of sediment,V

and the water at the front of the door would simply escape over theedge. The trough 17 may slope continuously from one side to the otherbut preferably is designed to slope to both side troughs from amidpoint. This construction gives the same fall as the single slope andin half the width of the door so it is much more eiective in causing thewater to run quickly to the side troughs, thus preventing the trough 17from filling up. The trough is also curved. to direct the liquid intothe side troughs 14, 15 at an angle less than a right angle.

The side troughs 14, 15 preferably are substantially horizontal as I donot depend upon the flow of liquid to keep them clean. I provide apositive means to remove their contents every time the door is moved.This means consists of plows or scrapers 2() car ried by the frame orintegral therewith which conform to the cross sectional shape of thetroughs. The scrapers are designed to have sufficient clearance so thatthey will notinterfere with the movement of the door when opening orclosing and yetwill remove substantially all the contents of the troughswhen the door is moved to fully open position. The front ends of thetroughs le and 15 are formed with inclined portions 21 eX- tendingforwardly and upwardly to prevent leakage of water over the ends of thetrough. They permit, however, any material which has collected in frontof the scraper 20 when the door is closing'to pass out over the inclinedend, thus preventing packing of the material against the ends 21 andpermitting the door to be moved to fully closed position.

At the rear of the door and secured to the frame ais a fixed trough 25which underlies the rear end of the door and receives the water from theside troughs 14, 15 and the rear end of the door, all of these beingcurved and lipped to deliver the water into the trough and prevent itfrom running back under the gate. The trough 25 has suitable dischargepipes 26 for conducting the liquid and sediment where desired.

yA suitable nozzle (diagrammatically indicated at 22) may be provided:for throwing streams of water in both directionsto 'positively cleanthe trough 17 when desired.

lWhile the gate construction has been shown herein as applied to aninwardly' sloping hopper and one having metal Walls lined with firebrick, '1t is to be understood that the gate mechanism is applicable toany 'the types et ash hoppers in use simply by adapting the frame andthe door to the particular design. of hopper.

It will also be seen -that by providing a positive means for cleaningthe side troughs at each movement oic the door I am enabled` to use asubstantially horizontal side trough and to give the end or front troughon the door a slope corresponding to the entire depth of the door whichis not possible where the sloping side troughs are used, thus enablingme to obtain a relatively steeper slope to the front trough or troughs.`

Furthermore, it is to be understood that the particular forms ofapparatus shown and described, and. the particular procedure set forth,are presented for purposes of explanation and illustration and thatvarious modifin cations of said apparatus and procedure can be madewithout departing from my invention as defined in the appended claims.

What I claim is:

1. The combination in a closure mechanism for bottom discharge hoppers,of a frame and a door reciprocable thereon, said door having ldraintroughs along its sides and means for scraping materiall from said sidetroughs upon relative movement of said door and said means.

2. The combination in a closure mechanism for bottom discharge hoppers,of a frame, a door reciprocable thereon, said door having troughs alongits sides, means to prevent material from. falling into said troughsfrom the hopper and means to clean said troughs upon relative movementof the cleaning means and the door.

3. The combination with a hopper provided with a bottom dischargeopening, of a frame surrounding said opening and provided Witlioutturned flanges, a door having suspending means to reciprocate on saidflanges to open and close said opening, said door having liquid carryingtroughs along its sides, and means for removing material from saidtroughs upon relative movement of said door and said removing means.

4. A closure mechanism for bottom discharge hoppers comprising a frame,a door reciprocable thereon, said door having drain troughs along itssides, and means carried by the frame for scraping material from saidside troughs when the door is moved.

5. A. closure mechanism for bottom discharge hoppers comprising a frame,a door reciprocable thereon, said door having drain troughs along itssides, and Scrapers com forming to the cross-sectionai shape o'l thetroughs and projecting into said side troughs to prevent material in thetrough from passing the scraper when the door is being opened. Y

6. A closure mechanism for a hopper having a bottom discharge openingcomprising a trame having inwardly disposed iianges,

a door reciprocahle on the traine and havim ing drain troughs along itssides and disposed beneath said anges, means carried by the frame toscrape said side troughs when` the door is being operated, and means toprevent material' from packing behind tie scraper thus permitting thedoor to c ose.

7. A closure mechanism for a hopper having a bottom discharge openingcomprising a frame having inwardly disposed anges, a door reciprocableon the frame and having drain troughs along its sides and disposedbeneath said fianges, and means carried by the frame to scrape said sidetroughs when the door is being moved, said side troughs bein open attheir forward ends and having the ottoms upwardly and outwardlyinclined.y

8. The combination with a hopper provided with a bottom dischargeopening, of'

a frame surrounding said opening, a door disposed betw'een portions ofsaid frame and adapted to reciprocate thereon to close said opening, thefront and sides of said door having drain troughs, the bottom of thefront trough havin a relatively steep inclination and discharging intothe side troughs, and means for removing material from said side troughsupon opening the door.

' 9. A closure mechanism for bottom discharge hoppers comprising a framehaving webs and inner iianges,I a door reciprocable on the frame, saiddoor having communicating troughs said troughs being disposed beneathsaid iianges and relatively close to the webs of said frame, meanscarried by the frame for receiving the liquid and materlal from saiddoor, and means for scraping material on its front end and sides,l

from said side troughs upon relative movement of said door and saidscraping means.

10. A- gate construction for a hopper having a bottom discharge opening,comprising' a frame having at its sides a vertical web and a flangedisposed on each side thereof, a door reciprocable to open and closesaid opening, said door having troughs along the front and sides, thefront trough having its bottom relatively steeply inclined, and means toclean the side troughs when the door isl opening.

11. The combination with a hopper provided With a bottom dischargeopenmg, of

a frame surrounding said opening, a doorI suspended therefrom andreciprocable thereon to open and close the discharge opening,

said door having drain troughs at the front and sides thereof, saidfrontl trough having its bottom sloping relatively steeply toward eachside of the door to discharge into said side troughs, said side troughsbeing sub stantially horizontally disposed, and means for removingmaterial from said troughs.

1n testimony whereof, I hereunto affix my signature.

FRANK H. DUNBAR.

